Selenium script updates

[queengooborg]

This PR performs a number of updates to the Selenium script to resolve some issues caused by some new custom tests, along with existing tests, due to permissions requirements. This PR also performs a few other little updates to make the script a little nicer, including the following:

• Increase test timeout
• Turn the browser-specific ignores into arrays rather than strings
• Remove logic to remap Safari 6.1
• Allow mic, camera, geolocation, and notifications for Chrome, Edge and Firefox
• Simplify code to ignore the Safari x.0 versions on BrowserStack
• Increase verbosity of tests and add more comments
• Encode the commas in URLs for EdgeHTML versions of Edge (due to some odd issues)
• Add a command line argument to reverse the browser's version order in testing (oldest-to-newest)
• Catch results upload failures

This should fix #1230 with both the timeout increase and the permissions, since the holes are caused by timeouts (sometimes due to an on-screen prompt).

[queengooborg]

It seems that Firefox is struggling at the moment. I'm unsure of whether it's something to do with this script's updates, or if it's the recent custom tests we've added, but I feel it's probably this script. Will need to look into it some more.